Selected Work

def generate_case_summary(case: Case, retrieved_chunks: list[str]) -> str:
    # Only the retrieved source text is allowed as grounding context
    context = "\n\n".join(retrieved_chunks)

    prompt = (
        f"Summarise this case using only the context below. "
        f"Every citation you make must appear verbatim in the context.\n\n"
        f"Context:\n{context}"
    )
    summary = call_claude(prompt)

    # Reject the summary if it cites anything not present in the source
    if not citations_verified(summary, context):
        raise GroundingError("Summary contains an unverified citation")

    return summary

def check_permission(user: User, resource: str, action: str) -> bool:
    # Resolve role hierarchy: church → region → country → HQ
    role_chain = get_role_chain(user.role, user.scope_level)

    for role in role_chain:
        policy = PERMISSION_MATRIX.get(role, {})
        if action in policy.get(resource, []):
            return True

    raise PermissionDenied(
        f"Role '{user.role}' cannot '{action}' on '{resource}'"
    )

def retrieve_and_respond(query: str, index: faiss.Index) -> str:
    # Embed the user query
    query_vec = embedder.encode([query])

    # Retrieve top-3 relevant document chunks
    _, indices = index.search(query_vec, k=3)
    context = "\n\n".join(doc_store[i] for i in indices[0])

    # Assemble grounded prompt for Claude
    prompt = (
        f"Answer using only the context below.\n\n"
        f"Context:\n{context}\n\n"
        f"Question: {query}"
    )
    return call_claude(prompt)